Defined Benefit Plans (Details) $ in Millions	Jul. 29, 2017 USD ($)
Supplemental Employee Retirement Plan [Member]
Defined Benefit Plans (Details) [Line Items]
Defined Benefit Plan, Expected Future Benefit Payment, Next Twelve Months	$ 1.2

Amount of benefits for defined benefit plan expected to be paid in next fiscal year following latest fiscal year.

Reference 1: http://www.xbrl.org/2003/role/presentationRef
-Publisher FASB
-Name Accounting Standards Codification
-Topic 715
-SubTopic 20
-Section 50
-Paragraph 1
-Subparagraph (f)
-URI http://asc.fasb.org/extlink&oid=82843861&loc=d3e1928-114920

Name:	us-gaap_DefinedBenefitPlanExpectedFutureBenefitPaymentsNextTwelveMonths
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant